package com.hmdp.service.impl;

import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import com.hmdp.dto.Result;
import com.hmdp.entity.ShopType;
import com.hmdp.mapper.ShopTypeMapper;
import com.hmdp.service.IShopTypeService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.utils.RedisConstants;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class ShopTypeServiceImpl extends ServiceImpl<ShopTypeMapper, ShopType> implements IShopTypeService {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;


    @Override
    public Result queryTypeList() {
        String key = RedisConstants.SHOP_TYPE_LIST_KEY + 1;
        // 先查redis
        String cacheList = stringRedisTemplate.opsForValue().get(key);

        if (StrUtil.isNotBlank(cacheList)) {  // 存在
            List<ShopType> list = JSONUtil.toList(cacheList, ShopType.class);
            return Result.ok(list);
        }

        // 不存在查数据库
        List<ShopType> res = query().orderByAsc("sort").list();

        if(res.isEmpty()){
            return Result.fail("店铺类型不存在");
        }

        // 存入redis 更新缓存
        stringRedisTemplate.opsForValue().set(key,JSONUtil.toJsonStr(res));


        return Result.ok(res);
    }
}
